from optparse import Option


string ="他问,你知道cba是什么单词的缩写么?"
print(string)
print('1.删除空格')
print('2.英文标点替换')
print('3.首字母大写')
print('4.退出')
while True:
    option =input("请输入功能选项：\n")
    if option=='1':
        string =string.replace(' ','')
        print(string)
    elif option=='2':
        for i in string:
            if i ==',':
                string = string.replace(',','，')
            elif i =='.':
                string = string.replace('.','。')
            elif i =='?':
                string = string.replace('?','？')
            elif i =='?':
                string = string.replace("' ","’")
        string=string
        print(string)
    elif option=='3':
        string=string.upper()
        print(string)
    elif option=='4':
        break
